Margaret Jay, Baroness Jay of Paddington, English journalist and politician, Leader of the House of Lords

Margaret Ann Jay, Baroness Jay of Paddington, is a British politician and former BBC television producer and presenter. She is a member of the Labour Party and is a daughter of James Callaghan, who was Prime Minister of the United Kingdom from 1976 to 1979.

The leader of the House of Lords is a member of the Cabinet of the United Kingdom who is responsible for arranging government business in the House of Lords. The post is also the leader of the governing party in the House of Lords who acts as the government party chairperson in the house. The role is always held in combination with a formal Cabinet position, usually one of the sinecure offices of Lord President of the Council, Lord Keeper of the Privy Seal or Chancellor of the Duchy of Lancaster. Unless the Leader is also a departmental minister, being Leader constitutes the bulk of their government responsibilities, but it has never been an independent salaried office. The Office of the Leader of the House of Lords is a ministerial department.